Kosovo has charged two ethnic Albanians with terror offenses for allegedly joining an Islamic militant group in Syria.

In a statement issued on May 6, the Prosecutor's Office said the two left Pristina in November 2013 for Turkey before eventually ending up in the city Azaz in Syria where they were trained and armed by the Al-Nusra Front rebel group.

They are believed to have taken part in fighting until they returned to Kosovo three months later.

It wasn't clear if they have been arrested.

If proved, the charges could lead to up to 10 years' imprisonment.

Authorities say that some 70 Kosovo citizens are believed to be active in Syria and Iraq.